In which of the following situations, does the list of numbers involved make an arithmetic progression and why? The taxi fare after each km when the fare is Rs 15 for the first km and Rs 8 for each additional km.

In which of the following situations, does the list of numbers involved make an arithmetic progression, and why ? :-The cost of digging a well after every metre of digging, when it costs $150 for the first metre and rises by $50 for each subsequent metre.

In which of the following situations, does the list of numbers involved make an arithmetic progression and why? The cost of digging a well after every metre of digging, when it costs Rs 150 for the first metre and rises by Rs 50 for each subsequentmetre.

In which of the following situations, does the list of numbers involved make an arithmetic progression, and why ? :- The amount of air present in a cylinder when a vacuum pump removes 1/4 of the air remaining in the cylinder at a time.

In which of the following situations, does the list of numbers involved make an arithmetic progression, and why ? :- The amount of money in the account every year when ? 10000 is deposited at compound interest at 8% per annum.

In which of the following situations, does the list of numbers involved make an arithmetic progression and why? The amount of air present in a cylinder when a vacuum pump removes (1)/(4) of the air remaining in the cylinder at a time.

In which of the following situations, does the list of numbers involved make an arithmetic progression and why? The amount of money in the account every year, when Rs 10000 is deposited at compound interest at 8% per annum.

Form the pair of linear equations for the following problems and find their solution by substitution method. The taxi charges in a city consist' of a fixed charge together with the charge for the distance covered. For a distance of 10 km, the charge paid is Rs105 and for a journey of 15 km, the charges paid is Rs155. What are the fixed charges and the charge per km? How much does a person have to pay for travelling a distance of 25 km ?

Form the pair of linear equations in the following problems and find their solutions (if they exist) by any algebraic method :-Places A and B are 80 km apart from each other on a highway. A car starts from A and another from B at the same time. If they move in the same direction they meet in 8 hours , and if they move in opposite direction, they meet in 1 hour and 20 minutes respectively. Find the speed of the cars.

Two trains leave a railway station at the same time. The first train travels due west and the second due north. The first train travels 5 km/hr faster than the second train. If after two hours, they are 50 km apart, find the average speed of each train.